//app.js
App({
  onLaunch: function(){
    var logs = wx.getStorageSync('logs') || []
    logs.unshift(Date.now())
    wx.setStorageSync('logs', logs)
  },    
  getUserInfo:function(cb){
    var that = this;
    if (this.globalData.userInfo){
        typeof cb == "function" && cb(this.globalData.userInfo)
    }else{
        wx.login({
            success: function(){
                wx.getUserInfo({
                    success: function(res){
                        that.globalData.userInfo = res.userInfo;
                        typeof cb == "function" && cb(that.globalData.userInfo)
                    }    
                })   
            }
        });
    }
  },
  globalData:{
    userInfo:null    
  }
})
